Pension Plans, Retirement Benefits and Savings Plans (Details) - Assumptions - United States [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Plans [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, cash balance interest crediting rate (percent)	4.01%	4.01%
Assumptions used to determine benefit obligations, future compensation increase rate (percent)	4.00%	4.00%
Assumptions used to determine net periodic benefit cost, expected long-term rate of return on assets (percent)	6.50%	6.75%
Pension Plans [Member] | Qualified Plan [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, discount rate (percent)	2.96%	2.60%
Assumptions used to determine net periodic benefit cost, discount rate used to measure service cost (percent)	2.96%	3.50%
Assumptions used to determine net periodic benefit cost, discount rate used to measure interest cost (percent)	1.88%	2.84%
Pension Plans [Member] | Nonqualified Plan [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, discount rate (percent)	2.82%	2.44%
Assumptions used to determine net periodic benefit cost, discount rate used to measure service cost (percent)	2.58%	3.30%
Assumptions used to determine net periodic benefit cost, discount rate used to measure interest cost (percent)	1.69%	2.73%
Postretirement Benefit Plans [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, discount rate (percent)	2.62%	2.27%
Assumptions used to determine net periodic benefit cost, discount rate used to measure interest cost (percent)	1.57%	2.67%
Assumptions used to determine net periodic benefit cost, expected long-term rate of return on assets (percent)	4.00%	4.00%
Assumed health care cost trend rates, rate to which the cost trend rate is assumed to decline (ultimate trend rate) (percent)	4.50%	4.50%
Postretirement Benefit Plan Before Age 65 [Member]
Defined benefit plan disclosure
Assumed health care cost trend rates, medical, following year (percent)	6.50%	6.75%
Assumed health care cost trend rates, medical, year that the rate reaches the ultimate trend rate	2029	2026
Postretirement Benefit Plan Age 65 and Older [Member]
Defined benefit plan disclosure
Assumed health care cost trend rates, medical, following year (percent)	8.00%	7.75%
Assumed health care cost trend rates, medical, year that the rate reaches the ultimate trend rate	2031	2027