v3.8.0.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
shares in Millions
Dec. 31, 2017
Jan. 01, 2017
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 320 320
Common stock, shares issued 191 189
Common stock, shares outstanding 147 146
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 10 10
Treasury stock, shares 44 43