Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Performance Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

		2021
Nonvested awards January 1,		7,003
Granted		10,187
Vested		—
Undistributed vested awards(c)		(3,320)
Nonvested awards December 31,		13,870
Weighted average fair Value of each nonvested award	$	104.76
Weighted average estimated payout % based on performance criteria		127.4%

(c)Represents performance units that vested but were not distributed to retirement-eligible employees during 2021.

Restricted Stock Units Equity Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

	2021
	Units	Weighted Average Grant Date Fair Value (per share)
Nonvested awards January 1,	—		N/A
Granted	16,267	$	65.83
Vested	—
Undistributed vested awards(a)	(3,141)	$	65.83
Nonvested awards December 31,	13,126	$	65.83

(a)Represents restricted stock units that vested but were not distributed to retirement-eligible employees during 2021.

Restricted Stock Units Liability Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

	2021
Nonvested awards January 1,	7,003
Granted	—
Vested	—
Undistributed vested awards(b)	(939)
Nonvested awards December 31,	6,064

(b)Represents restricted stock units that vested but were not distributed to retirement-eligible employees during 2021.

2006 Performance Unit Plan and 2013 Director Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance Unit Graded Vesting Schedule

The following activity occurred:

	2021
	Director Incentive Plan	Performance Unit Plan
Nonvested awards January 1,	4,286	17,420
Granted	—	—
Vested	(2,814)	(11,660)
Nonvested awards December 31,	1,472	5,760