Allowance for Losses on Financial Assets Allowance for Losses on Financial Assets (Allowance Disclosure) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Allowance for Losses on Financial Assets [Line Items]
Allowance for Credit Loss	$ (375)	$ (808)	$ (747)	$ (802)
Credit Loss Expense, Reversal	55	22
Allowance for Credit Loss, Writeoff	422	16
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss	(148)	(413)	(390)	(444)
Accounts Receivable, Credit Loss Expense (Reversal)	(5)	(16)
Accounts Receivable, Allowance for Credit Loss, Writeoff	242	15
Credit Loss, Recoveries	5
Accounts Receivable, Allowance for Credit Loss, Recovery	5
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Contract with Customer, Asset, Allowance for Credit Loss	(26)	(129)	(91)	(129)
Contract with Customer, Asset, Credit Loss Expense (Reversal)	18
Contract with Customer, Asset, Allowance for Credit Loss, Writeoff	47
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	(60)	(16)	(18)	(17)
Financing Receivable, Credit Loss, Expense (Reversal)	42	1
Other Current Assets
Allowance for Losses on Financial Assets [Line Items]
Allowance for Credit Loss	(61)	(74)	(62)	(72)
Credit Loss Expense, Reversal	1	3
Allowance for Credit Loss, Writeoff		1
Other Noncurrent Assets
Allowance for Losses on Financial Assets [Line Items]
Allowance for Credit Loss	(80)	(176)	$ (186)	$ (140)
Credit Loss Expense, Reversal	27	$ 36
Allowance for Credit Loss, Writeoff	$ 133