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Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Allocation) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Expense (Benefit), Intraperiod Tax Allocation [Abstract]      
Tax expense (benefit) per statement of earnings $ 100 $ 208 $ (321)
Tax expense (benefit) attributable to discontinued operations 0 (1) 0
Unrealized (loss) gain on foreign currency translation 240 0 0
Unrealized gain (loss) on interest rate swaps (41) 0 0
Other components of other comprehensive earnings (loss) (3) 1 (11)
Total income tax expense (benefit) allocated to other comprehensive income 196 1 (11)
Total income tax expense (benefit) $ 296 $ 208 $ (332)