Stockholders' Equity and Stock-Based Compensation (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of year	$ (1,027)	$ (368)	$ (3,068)
Increase (decrease)	(1,440)	(318)	2,223
Income tax impact	(201)	(104)	82
Other comprehensive income (loss) before reclassifications, net of income taxes	(1,641)	(422)	2,305
Increase (decrease)	(193)	(222)	407
Income tax impact	(11)	(15)	(12)
Reclassification adjustments, net of income taxes	(204)	(237)	395
Net other comprehensive income (loss), net of income taxes	(1,845)	(659)	2,700
Balance at end of year	(2,872)	(1,027)	(368)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of year	(539)	745	(2,174)
Increase (decrease)	(2,051)	(1,277)	2,894
Income tax impact	(54)	(7)	25
Other comprehensive income (loss) before reclassifications, net of income taxes	(2,105)	(1,284)	2,919
Increase (decrease)	0	0	0
Income tax impact	0	0	0
Reclassification adjustments, net of income taxes	0	0	0
Net other comprehensive income (loss), net of income taxes	(2,105)	(1,284)	2,919
Balance at end of year	(2,644)	(539)	745
Pension and Postretirement Plan Benefit Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of year	(550)	(928)	(781)
Increase (decrease)	233	436	(239)
Income tax impact	(56)	(102)	57
Other comprehensive income (loss) before reclassifications, net of income taxes	177	334	(182)
Increase (decrease)	42	58	46
Income tax impact	(10)	(14)	(11)
Reclassification adjustments, net of income taxes	32	44	35
Net other comprehensive income (loss), net of income taxes	209	378	(147)
Balance at end of year	(341)	(550)	(928)
Cash Flow Hedge Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of year	62	(185)	(113)
Increase (decrease)	378	523	(432)
Income tax impact	(91)	5	0
Other comprehensive income (loss) before reclassifications, net of income taxes	287	528	(432)
Increase (decrease)	(235)	(280)	361
Income tax impact	(1)	(1)	(1)
Reclassification adjustments, net of income taxes	(236)	(281)	360
Net other comprehensive income (loss), net of income taxes	51	247	(72)
Balance at end of year	$ 113	$ 62	$ (185)