Annual report pursuant to Section 13 and 15(d)

Income Taxes Income Taxes (Effective Income Tax Rate Reconciliation) (Details)

v3.20.4
Income Taxes Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation, Percent [Abstract]      
Provision at statutory rate 21.00% 21.00% 21.00%
State income taxes, net of federal benefit 4.20% 2.90% 2.20%
Foreign taxes 2.00% 1.00% 0.80%
Effective Income Tax Rate Reconciliation, Write-off of investment and Notes, Percent 0.00% (3.10%) 0.00%
Valuation allowance 0.40% 3.20% 2.60%
Permanent differences (0.50%) (0.20%) (0.20%)
Effective Income Tax Rate Reconciliation, Corporate restructuring, percent 0.90% 0.00% 0.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent 0.00% 0.90% 0.60%
Impact of foreign currency tax regulation 0.00% (0.70%) (0.60%)
Other, net (1.00%) (0.70%) 0.10%
Total income tax expense 27.00% 24.30% 26.50%
Income Tax Expense (Benefit) $ 337 $ 262 $ 334
Other Restructuring [Member]      
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation, Percent [Abstract]      
Income Tax Expense (Benefit) $ 11