Share-Based Payment (Tables)

12 Months Ended

Dec. 31, 2017

Share-Based Payment

Compensation Cost [Table Text Block]

		2017		2016		2015
Performance stock units	$	395	$	480	$	299
Restricted stock and stock units		90		152		147
Other nonvested stock units		(5)		21		5
Total	$	480	$	653	$	451
Income tax benefit	$	184	$	250	$	172

Status Of Nonvested Stock Units Activity And Changes During Year [Table Text Block]

Nonvested Stock Units	Shares		Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2017	31	$	35.57
Granted	13		41.17
Vested	(14)		34.70
Forfeited	(1)		37.48
Nonvested at December 31, 2017	29	$	38.35