Stockholder's Equity (Tables)

6 Months Ended

Mar. 31, 2017

Stockholders' Equity Note [Abstract]

Dividends Declared

During the three and six months ended March 31, 2017, dividends charged to retained earnings were as follows (in millions, except per share data):

	Per share		Total
First quarter	$	0.28	$	51.8
Second quarter	0.28		51.8
Total	$	0.56	$	103.6

Schedule of share-based compensation expense

The following table summarizes the share-based compensation expense by line item in the Statement of Operations (in millions):

	Three Months Ended				Six Months Ended
	March 31, 2017		April 1, 2016		March 31, 2017		April 1, 2016
Cost of sales	$	3.4	$	3.2	$	7.2	$	7.2
Research and development	8.5		6.7		16.8		16.2
Selling, general and administrative	10.2		7.2		19.7		17.0
Total share-based compensation	$	22.1	$	17.1	$	43.7	$	40.4