Equity, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Beginning balance, accumulated other comprehensive loss, net of tax			$ 18,430
Other comprehensive income (loss) before reclassifications	$ (491)	$ 59	(545)	$ 131
Amounts reclassified from accumulated other comprehensive loss	73	18	126	35
Effect of exchange rates	2	(1)	2	(1)
Other comprehensive income (loss)	(416)	76	(417)	165
Ending balance, accumulated other comprehensive loss, net of tax	20,969		20,969
Accumulated Other Comprehensive Loss [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Beginning balance, accumulated other comprehensive loss, net of tax	(1,009)	(1,165)	(1,008)	(1,254)
Ending balance, accumulated other comprehensive loss, net of tax	(1,425)	(1,089)	(1,425)	(1,089)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Beginning balance, accumulated other comprehensive loss, net of tax	(549)	(439)	(562)	(515)
Other comprehensive income (loss) before reclassifications	(442)	66	(429)	142
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Effect of exchange rates	0	0	0	0
Other comprehensive income (loss)	(442)	66	(429)	142
Ending balance, accumulated other comprehensive loss, net of tax	(991)	(373)	(991)	(373)
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Beginning balance, accumulated other comprehensive loss, net of tax	(437)	(728)	(441)	(737)
Other comprehensive income (loss) before reclassifications	1	0	(2)	1
Amounts reclassified from accumulated other comprehensive loss	4	14	11	22
Effect of exchange rates	2	(1)	2	(1)
Other comprehensive income (loss)	7	13	11	22
Ending balance, accumulated other comprehensive loss, net of tax	(430)	(715)	(430)	(715)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Beginning balance, accumulated other comprehensive loss, net of tax	(23)	2	(5)	(2)
Other comprehensive income (loss) before reclassifications	(50)	(7)	(114)	(12)
Amounts reclassified from accumulated other comprehensive loss	69	4	115	13
Effect of exchange rates	0	0	0	0
Other comprehensive income (loss)	19	(3)	1	1
Ending balance, accumulated other comprehensive loss, net of tax	$ (4)	$ (1)	$ (4)	$ (1)