Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Shares of restricted stock granted at Dec. 31:

Changes in nonvested restricted stock:



(Shares in Thousands)	Shares		Weighted Average Grant Date Fair Value
Nonvested restricted stock at Jan. 1, 2018	44		$	39.71
Granted	18		44.68
Forfeited	—		—
Vested	(27	)	37.25
Dividend equivalents	1		46.27
Nonvested restricted stock at Dec. 31, 2018	36		44.29

Equity award units granted to employees (excluding restricted stock):



(Units in Thousands)	2018		2017		2016
Granted units	500		503		522
Weighted average grant date fair value	$	47.60	$	41.02	$	36.00

Equity awards vested:

Changes in the nonvested portion of equity award units for 2018:



(Units in Thousands)	Units		Weighted Average Grant Date Fair Value
Nonvested Units at Jan. 1, 2018	995		$	38.48
Granted	500		47.60
Forfeited	(126	)	41.74
Vested	(475	)	35.92
Dividend equivalents	45		40.74
Nonvested Units at Dec. 31, 2018	939		44.30

Stock equivalent units granted:



(Units in Thousands)	2018		2017		2016
Granted units	36		51		49
Weighted average grant date fair value	$	45.44	$	46.05	$	40.68

Changes in stock equivalent units:



(Units in Thousands)	Units		Weighted Average Grant Date Fair Value
Stock equivalent units at Jan. 1, 2018	753		$	29.83
Granted	36		45.44
Units distributed	(123	)	31.21
Dividend equivalents	22		46.40
Stock equivalent units at Dec. 31, 2018	688		30.93

TSR liability awards granted:

TSR liability awards settled:



(In Thousands)	2018		2017		2016
Awards settled	482		454		354
Settlement amount (cash, common stock and deferred amounts)	$	21,534	$	19,083	$	13,724

Compensation costs related to share-based awards:



(Millions of Dollars)	2018		2017		2016
Compensation cost for share-based awards ^(a)	$	45	$	57	$	41
Tax benefit recognized in income	12		22		16


^(a)	Compensation costs for share-based payment are included in O&M expense.