Employee Share-Based Incentive Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Summary of performance shares outstanding and accrued expense for performance shares awarded under the WTM Incentive Plan

The following table presents the performance share activity for the three months ended March 31, 2021 and 2020 for performance shares granted under the WTM Incentive Plan:


	Three Months Ended March 31,
		2021	2020
Millions, except share amounts			Target Performance Shares Outstanding	Accrued Expense		Target Performance Shares Outstanding	Accrued Expense
Beginning of period			42,458	$	56.3	42,473	$	43.7
Shares paid (1)			(14,117)	(34.6)		(14,070)	(27.7)
New grants			13,000	—		14,055	—
Forfeitures and cancellations(2)			(557)	.4		—	.4
Expense recognized			—	16.1		—	(6.6)
End of period			40,784	$	38.2	42,458	$	9.8

(1) WTM performance share payments in 2021 for the 2018-2020 performance cycle, which were paid in cash in March 2021 at 200% of target. WTM performance share payments in 2020 for the 2017-2019 performance cycle, which were paid in cash in March 2020, ranged from 174% to 180% of target.

(2) Amounts include changes in assumed forfeitures, as required under GAAP.

Share-based Compensation, Performance Shares Award Outstanding Activity

The following table presents performance shares outstanding and accrued expense for performance shares awarded under the WTM Incentive Plan as of March 31, 2021 for each performance cycle:


	Three Months Ended March 31, 2021
Millions, except share amounts	Target Performance Shares Outstanding	Accrued Expense
Performance cycle:
2019 – 2021	14,850	$	24.9
2020 – 2022	13,555	12.7
2021 – 2023	13,000	1.2

Sub-total	41,405	38.8
Assumed forfeitures	(621)	(.6)
March 31, 2021	40,784	$	38.2

Summary of restricted shares activity

The following table presents the unrecognized compensation cost associated with the outstanding restricted share awards for the three months ended March 31, 2021 and 2020:


	Three Months Ended March 31,
		2021	2020
Millions, except share amounts			Restricted Shares	Unamortized Issue Date Fair Value		Restricted Shares	Unamortized Issue Date Fair Value
Non-vested,
Beginning of period			43,105	$	15.2	43,395	$	16.7
Issued			13,000	15.6		14,055	15.1
Vested			(17,717)	—		(14,345)	—
Forfeited			(583)	(.6)		—	—
Expense recognized			—	(4.0)		—	(5.2)
End of period			37,805	$	26.2	43,105	$	26.6