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Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Allocation) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Expense (Benefit), Intraperiod Tax Allocation [Abstract]      
Tax expense (benefit) per statement of earnings $ 96 $ 100 $ 208
Tax expense (benefit) attributable to discontinued operations 0 0 (1)
Unrealized (loss) gain on foreign currency translation (154) 240 0
Unrealized gain (loss) on interest rate swaps (7) (41) 0
Other components of other comprehensive earnings (loss) 0 (3) 1
Total income tax expense (benefit) allocated to other comprehensive income (161) 196 1
Total income tax expense (benefit) $ (65) $ 296 $ 208