Equity (Tables)

3 Months Ended

Mar. 31, 2018

Equity

Schedule of common stock and additional paid-in capital activity

	Three Months Ended
	March 31, 2018
				Weighted Average
	Shares	Amount		Exercise Price
	(in millions, except share and per share amounts)
Stock-based compensation(1)	269,433	$	1.0
Stock options exercised	48,275		2.8	$	57.91
Share repurchases(2)	(592,564)		(50.0)
Total	(274,856)	$	(46.2)

⁽¹⁾ Stock-based compensation expense of $6.4 million reduced by $5.4 million of payments we made to tax authorities on our employees’ behalf for shares withheld related to net share settlements.

⁽²⁾ Includes 8,120 shares for $0.7 million pending settlement at March 31, 2018.

Summary of the status of the Company's unvested restricted stock units and changes during the year

		Weighted
		Average Grant
Unvested Shares	Shares	Date Fair Value
Unvested at January 1, 2018	924,575	$	74.09
Granted(1)	474,715		84.26
Vested	(3,032)		71.59
Cancelled or forfeited	(10,018)		73.84
Unvested at March 31, 2018	1,386,240	$	77.58
Shares reserved for future grants (all plans)	1,379,291

⁽¹⁾ 474,715 RSUs, including 178,970 performance-based RSUs, were granted in March 2018.

Schedule of accumulated other comprehensive loss

			Pension and		Accumulated
	Foreign Currency		Postretirement		Other
	Translation		Benefit Adjustments,		Comprehensive
	Loss		Net of Tax		Loss
	(in millions)
Balance as of January 1, 2018	$	(51.1)	$	(20.5)	$	(71.6)
Current-period change		(2.9)		—		(2.9)
Balance as of March 31, 2018	$	(54.0)	$	(20.5)	$	(74.5)