Pension Plans, Retirement Benefits and Savings Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plans [Member]
Change in projected benefit obligation [Roll Forward]
Benefit obligation, balance, beginning of year	$ 4,471	$ 4,591
Benefits earned	145	141	$ 133
Interest cost on benefit obligation	101	83	114
Actuarial (gain) loss	(845)	(75)
Benefits paid	(277)	(268)
Settlement	(3)	0
Foreign currency exchange rate change, change in projected benefit obligation	(12)	(1)
Benefit obligation, balance, end of year	3,580	4,471	4,591
Change in plan assets [Roll Forward]
Fair value of plan assets, balance, beginning of year	5,036	4,756
Actual return on plan assets	(723)	537
Company contributions	13	12
Benefits paid	(277)	(268)
Settlement	(3)	0
Foreign currency exchange rate change, change in plan assets	(13)	(1)
Fair value of plan assets, balance, end of year	4,033	5,036	4,756
Funded status of plan at end of year	453	565
Amounts recognized in the consolidated balance sheet consist of:
Accrued over-funded benefit plan assets	561	696
Accrued under-funded benefit plan liabilities	(108)	(131)
Total amount recognized in the consolidated balance sheet	453	565
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Net actuarial loss (gain)	790	667
Prior service cost (benefit)	0	(1)
Total amount recognized in accumulated other comprehensive income (loss)	790	666
Pension Plans [Member] | United States [Member] | Qualified Plan [Member]
Change in projected benefit obligation [Roll Forward]
Benefit obligation, balance, beginning of year	4,212	4,326
Benefits earned	137	135
Interest cost on benefit obligation	95	79
Actuarial (gain) loss	(781)	(73)
Benefits paid	(263)	(255)
Settlement	0	0
Foreign currency exchange rate change, change in projected benefit obligation	0	0
Benefit obligation, balance, end of year	3,400	4,212	4,326
Change in plan assets [Roll Forward]
Fair value of plan assets, balance, beginning of year	4,902	4,631
Actual return on plan assets	(701)	526
Company contributions	0	0	0
Benefits paid	(263)	(255)
Settlement	0	0
Foreign currency exchange rate change, change in plan assets	0	0
Fair value of plan assets, balance, end of year	3,938	4,902	4,631
Funded status of plan at end of year	538	690
Amounts recognized in the consolidated balance sheet consist of:
Accrued over-funded benefit plan assets	538	690
Accrued under-funded benefit plan liabilities	0	0
Total amount recognized in the consolidated balance sheet	538	690
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Net actuarial loss (gain)	785	618
Prior service cost (benefit)	(1)	(2)
Total amount recognized in accumulated other comprehensive income (loss)	784	616
Nonqualified and Foreign Pension Plans [Member]
Change in projected benefit obligation [Roll Forward]
Benefit obligation, balance, beginning of year	259	265
Benefits earned	8	6
Interest cost on benefit obligation	6	4
Actuarial (gain) loss	(64)	(2)
Benefits paid	(14)	(13)
Settlement	(3)	0
Foreign currency exchange rate change, change in projected benefit obligation	(12)	(1)
Benefit obligation, balance, end of year	180	259	265
Change in plan assets [Roll Forward]
Fair value of plan assets, balance, beginning of year	134	125
Actual return on plan assets	(22)	11
Company contributions	13	12
Benefits paid	(14)	(13)
Settlement	(3)	0
Foreign currency exchange rate change, change in plan assets	(13)	(1)
Fair value of plan assets, balance, end of year	95	134	125
Funded status of plan at end of year	(85)	(125)
Amounts recognized in the consolidated balance sheet consist of:
Accrued over-funded benefit plan assets	23	6
Accrued under-funded benefit plan liabilities	(108)	(131)
Total amount recognized in the consolidated balance sheet	(85)	(125)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Net actuarial loss (gain)	5	49
Prior service cost (benefit)	1	1
Total amount recognized in accumulated other comprehensive income (loss)	6	50
Postretirement Benefit Plans [Member]
Change in projected benefit obligation [Roll Forward]
Benefit obligation, balance, beginning of year	149	171
Benefits earned	0	0	0
Interest cost on benefit obligation	3	3	4
Actuarial (gain) loss	(45)	(16)
Benefits paid	(7)	(9)
Foreign currency exchange rate change, change in projected benefit obligation	(1)	0
Benefit obligation, balance, end of year	99	149	171
Change in plan assets [Roll Forward]
Fair value of plan assets, balance, beginning of year	9	11
Actual return on plan assets	0	0
Company contributions	6	7
Benefits paid	(7)	(9)
Fair value of plan assets, balance, end of year	8	9	$ 11
Funded status of plan at end of year	(91)	(140)
Amounts recognized in the consolidated balance sheet consist of:
Accrued under-funded benefit plan liabilities	(91)	(140)
Total amount recognized in the consolidated balance sheet	(91)	(140)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Net actuarial loss (gain)	(94)	(54)
Prior service cost (benefit)	(11)	(14)
Total amount recognized in accumulated other comprehensive income (loss)	$ (105)	$ (68)