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Subsequent Event Subsequent Event (Notes)	6 Months Ended
Subsequent Event Subsequent Event (Notes)	Aug. 04, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Event On August 15, 2018, we signed a definitive agreement to acquire GreatCall, Inc. for $800 million in cash. GreatCall, Inc. is a leading provider of connected health and personal emergency response services to the aging population. The transaction is subject to regulatory approvals and other customary closing conditions and is expected to close by the end of our fiscal 2019 third quarter.