Nonoperating Income (Expense), Net (Schedule of Nonoperating Income (Expense)) (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Other components of net periodic benefit costs		$ 42	$ 16	$ 12
Realized investment gains (losses)		120	25	0
Unrealized investment gains (losses)		281	(7)	0
Total investment gains (losses)		401	18	0
Gains on sale of product lines	$ 455	13	455	0
Other		0	5	0
Other income (expense), net		$ 456	$ 494	$ 12